Michael veehoeten



@geiten tersa aient ffice.

Letters Patent .2l-7o. 76,563, dated April 7, 1868.

IMPROVEMENT IN LIME-KEES.

' @its tlptnle aferra tu Ain tipa trttert ntect ma rating @mit nf itssamt.

*TO ALL WHOM IT MAY OONCERN:

Be it known that I, MICHAEL VERHOEVEN, of Rochester, in the county ofMonroe, and State of New York, have invented a certain new and usefulImprovement in Lime-Kilns; and I do hereby declare that the following isa vfull and exact description thereof, reference being had to theaccompanying drawings, making part of -this specification. i

Figure l is a central vertical section of my improved lime-kiln.

Figure 2, a similar section at right angles to g. 1.

l Figure 3, a horizontal. section inplane of line xx, iig. 2.

Figure 4, a section in line yy, g. 2.l

Figure 5, a vertical cross-section of one of the furnaces.

Figure 6, a perspective view of one of the furnace-doors.

Like letters of reference indicate corresponding parts in all theiigurcs.

My invention has special referencelto the construction and arrangementofthe furnace and the ilues leading therefrom.

In the drawings, A- represents the cupola, which is of usual form,having a draw-arch, a, and peep-holes, b b.

At the proper position, on two opposite sides, are situated furnaces, BB, with ash-pits, cc, beneath, which serve to hold water. These furnacesare of peculiar construction.

A grate is formed of a series of loose bars, cid, which simply restacross sharp-edged supports, ff. These bars may be drawn out singly,whenever desired, as in r'ed lines g, 8, which is a matter of muchimportance to prevent clinkering. Whenever clinkersform, the grate is atonce relieved by drawing out one or more of the bars. This arrangementalso allowsan easy replacing of-any portion of the grate whenever i'tbecomes burned out. v

On each side and in the rear of thegrate are made inclines ggg', thoseon the side bevelling upward a'nd outward laterally,- gradually wideningtoward the shaft, so as to'embraccnearly the whole diameter of theinterior of the kiln, while that in the rear simply bevels'upward andinward, forming a sort of rim or boundary between the furnace and shaft,as clearly shown. These inclines are of m-uch'importance in expandingand directing the heat' from the furnaces in a'slan'ting direction upinto the body of the rock, so as to spread through the whole area of theshaft, as indicated by the'arrows in iig.-3. In ordinary lime-kilns,these sides ofthe furnace are vertical, and the heat is directed only ina close body toward the interior of the kiln, without striking thesides. It is my object, in -thus slanting the sides of the furnace, andwidening inward, to obviate this diiiculty, by spreading and diifusingthe heat, as much as possible, so as to strike the whole cross-area ofthe shaft, and thus` produce an equality in burning. y

Piers h L h are built up at the inner ends of the furnaces to supportthe arch, as shown.

On the sides of each furnace are situated passages, C C, whichcommunicate at the inner ends with the shaft of the kiln at rightangles, or nearly so, to the furnaces, while at the outer end theycommunicate withthe open air for the removal of ashes, &c., that collectthere. Lateral passages z'z' connect these side passages with thefurnaces, whereby the heat is carried around to the sides of the shaft,and `open at that point, 'Where the least heat reaches vdirectly fromthe fu/rnace. These passages act in conjunction with the daring sides ofthe furnace to produce suchan lequality of heatas will burn the limee`ectively.

I construct the top of e'ach furnace with a double arch, c k', with anintervening space, Z, which communicates directly with the outer air, asclearly shown in g. 2. This arrangement not only cools the arch, 4andin.

a great degree prevents it from burning out, but it also enables .thelower arch c to be replaced when necessary, without disturbing the otherparts.

These features of removable grate-bars d, the flaring sides gg', theside passages O, with lateral passages z', and the double arch kk', withan air-space, Z, between, constitute the novelty of this part of myinvention.

A casing, D, of the form shown in iig. 6, is built into4 the outer endof each furnace, to which is hung a.

door, E, in 'such a-manner that the bottom sets out more than the'top,so that' when the door swings out, the tendency is for it to close 'ofits own weight, thu's making it automatic. Y

The door itself consists of a cast-'ron frame, m, and a tile or slab, u,of earthenware. fitted therein.4 This arrangement of the door pret ents,`in a great degree, burning out," and when the tile becomes worthless,it is replaced by another with the greatest'facility,

At a suitable distance from the top of the cupola, angular Yilues, pp',extend from the shaft outward,'as

clearly shown, `the -object of which is to allow a freejpassage ofsteam, gases, and sulphur-fumes from the body of lime. In filling theshaft, the top of the same becomes in a degree clogged or choked,preventing a free escape of steam, 857e., and the consequenceis, inordinary kilns, the calcned-lime becomes dis'colored and injured.

The nguLlan-Huespp obviate all diiculty of this kind,` by providingescape belcw thepacked top, which escape is always free. y

What I claim as my invention, and desire to secure by Letters Patent,isy v The cnnstruction and arrangement of the' furnaces with theremovable grate-bars d, langular diusing sides ggg', lateral passages Cz', and-double' arches lek', with 'intervening air-space l, the wholeoperating in the mannerand forthe purpose hereinv set-forth. p

In witness whereof, have hereunto signed my name in the presence of twosubscribing witnesses.

MICHAEL VERHOEVEN.

